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\title{Brief Article}
\author{The Author}
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\begin{itemize}
\item study condensation energy ($\epsilon_{N}$) of two-fermion system with Richardson-Gaudin equation
\item trend of ``moth-eaten" effect in $\epsilon_{N}$ from one to many pairs;
\item $\epsilon_{N}$ first increases/emerges, then decreases to zero with increase of pair number in 3D
\item $\epsilon_{N}$ always decreases with increase of pair number in 2D;
\item quantitative analysis of $\epsilon_{N}$ for two pairs, in 2D and 3D 
\end{itemize}

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